Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F12%3A51803" target="_blank" >RIV/60460709:41330/12:51803 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite
Original language description
Refractory inclusions in primitive meteorites are the oldest objects formed in the Solar System. They exhibit large mass-dependent isotopic effects in many elements, including Si, Mg and Ca, indicative of their complex origin. We report data for both mass dependent (d) and mass-independent (e) Ca isotopic effects, and rare earth element (REE) abundances in six refractory inclusions from the Allende meteorite. Data reveal mass-dependent Ca isotopic effects in these refractory inclusions, with d44/40Ca ranging from -5.60 to +0.35, which are significantly lower than that of the bulk silicate Earth. Importantly, d44/40Ca is correlated with REE patterns: refractory inclusions with Group II REE patterns have lighter Ca isotope compositions compared to thosewith Group I REE patterns. The studied refractory inclusions form negative 44Ca/40Ca-Tm/Er trends, implying segregation of up to 3% of an ultrarefractory evaporation residue from a chondritic reservoir prior to the formation of refractory
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DD - Geochemistry
OECD FORD branch
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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